Rear 4” spring measurement needed!

[Cdubvw]

Hello! I’m looking for a measurement from the ground to the top of the fender opening on the rear of a suburban. I currently have 2” front springs and want to make sure that 4” won’t be too much making the rear lower than the front. Specifically I plan on purchasing the HD 4” lowering springs some vendors sell. I know my rear springs are saggy and I won’t get a true 4 inches from where it sits now. Thanks for any help!
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